Quote:
Originally Posted by William73
I'm about to do the first oil change in the '87 300E with 156k I just bought.
I like to use a can of 5 minute flush before I change the oil. Then again, I usually do this in an old International, not a Mercedes-Benz.
Would it be a bad idea to do this?
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My only concern around the flush products is that they can expose pre-existing leaks in the motor by clearing out whatever buildup may be masking the leak right now. I'm not saying your car has this as an issue, but if it does, you'll start to see leaks appear.
I would suggest you consider the use of Shell Rotella 15w40 because this product has a much higher concentration of detergents in the additive pacakge than standard oils have. This can help clean the inside of your motor (and prevent additional buildup going forward) without using the more aggressive 5 minute flush type of product.